Table 5. (Continued) Compression and Extension Spring Deflections a
Wire Size or Washburn and Moen Gauge, and Decimal Equivalent
Spring Outside Dia.
13
12
11
10
9
8
7
6
5
4
15
14
3 ∕ 32
1 ∕ 8
5 ∕ 32
3 ∕ 16
7 ∕ 32
.072 .080 .0915 .0938 .1055 .1205
.125
.135
.1483 .1563
.162
.177
.1875
.192
.207
.2188 .2253
Deflection f (inch) per coil, at Load P (pounds)
Nom.
Dec.
7 ∕ 8 .875 .251 .222 .1882 .1825 .1574 .1325 .1262 .1138 .0999 .0928 .0880 .0772 .0707 .0682 .0605 .0552 .0526 18.26 25.3 39.4 41.5 59.9 91.1 102.3 130.5 176.3 209. 234. 312. 377. 407. 521. 626. 691. 29 ∕ 32 .9063 .271 .239 .204 .1974 .1705 .1438 .1370 .1236 .1087 .1010 .0959 .0843 .0772 .0746 .0663 .0606 .0577 17.57 24.3 36.9 39.9 57.6 87.5 98.2 125.2 169.0 199.9 224. 299. 360. 389. 498. 598. 660. 15 ∕ 16 .9375 .292 .258 .219 .213 .1841 .1554 .1479 .1338 .1178 .1096 .1041 .0917 .0842 .0812 .0723 .0662 .0632 16.94 23.5 35.6 38.4 55.4 84.1 94.4 120.4 162.3 191.9 215. 286. 345. 373. 477. 572. 631. 31 ∕ 32 .9688 .313 .277 .236 .229 .1982 .1675 .1598 .1445 .1273 .1183 .1127 .0994 .0913 .0882 .0786 .0721 .0688 16.35 22.6 34.3 37.0 53.4 81.0 90.9 115.9 156.1 184.5 207. 275. 332. 358. 457. 548. 604. 1 1.000 .336 .297 .253 .246 .213 .1801 .1718 .1555 .1372 .1278 .1216 .1074 .0986 .0954 .0852 .0783 .0747 15.80 21.9 33.1 35.8 51.5 78.1 87.6 111.7 150.4 177.6 198.8 264. 319. 344. 439. 526. 580. 1 1 ∕ 32 1.031 .359 .317 .271 .263 .228 .1931 .1843 .1669 .1474 .1374 .1308 .1157 .1065 .1029 .0921 .0845 .0809 15.28 21.1 32.0 34.6 49.8 75.5 84.6 107.8 145.1 171.3 191.6 255. 307. 331. 423. 506. 557. 1 1 ∕ 16 1.063 .382 .338 .289 .281 .244 .207 .1972 .1788 .1580 .1474 .1404 .1243 .1145 .1107 .0993 .0913 .0873 14.80 20.5 31.0 33.5 48.2 73.0 81.8 104.2 140.1 165.4 185.0 246. 296. 319. 407. 487. 537. 1 1 ∕ 32 1.094 .407 .360 .308 .299 .260 .221 .211 .1910 .1691 .1578 .1503 .1332 .1229 .1188 .1066 .0982 .0939 14.34 19.83 30.0 32.4 46.7 70.6 79.2 100.8 135.5 159.9 178.8 238. 286. 308. 393. 470. 517. 1 1 ∕ 8 1.125 .432 .383 .328 .318 .277 .235 .224 .204 .1804 .1685 .1604 .1424 .1315 .1272 .1142 .1053 .1008 13.92 19.24 29.1 31.4 45.2 68.4 76.7 97.6 131.2 154.7 173.0 230. 276. 298. 379. 454. 499. 1 3 ∕ 16 1.188 .485 .431 .368 .358 .311 .265 .254 .231 .204 .1908 .1812 .1620 .1496 .1448 .1303 .1203 .1153 13.14 18.15 27.5 29.6 42.6 64.4 72.1 91.7 123.3 145.4 162.4 215. 259. 279. 355. 424. 467. 1 1 ∕ 4 1.250 .541 .480 .412 .400 .349 .297 .284 .258 .230 .215 .205 .1824 .1690 .1635 .1474 .1363 .1308 12.44 17.19 26.0 28.0 40.3 60.8 68.2 86.6 116.2 137.0 153.1 203. 244. 263. 334. 399. 438. 1 5 ∕ 16 1.313 .600 .533 .457 .444 .387 .331 .317 .288 .256 .240 .229 .205 .1894 .1836 .1657 .1535 .1472 11.81 16.31 24.6 26.6 38.2 57.7 64.6 82.0 110.1 129.7 144.7 191.6 230. 248. 315. 376. 413. 1 3 ∕ 8 1.375 .662 .588 .506 .491 .429 .367 .351 .320 .285 .267 .255 .227 .211 .204 .1848 .1713 .1650 11.25 15.53 23.4 25.3 36.3 54.8 61.4 77.9 104.4 123.0 137.3 181.7 218. 235. 298. 356. 391 1 7 ∕ 16 1.438 .727 .647 .556 .540 .472 .404 .387 .353 .314 .295 .282 .252 .234 .227 .205 .1905 .1829 10.73 14.81 22.3 24.1 34.6 52.2 58.4 74.1 99.4 117.0 130.6 172.6 207. 223. 283. 337. 371. a This table is for ASTM A229 oil tempered spring steel with a torsional modulus G of 11,200,000 psi, and an uncorrected torsional stress of 100,000 psi. For other materials, and other important footnotes, see page 321 .
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